<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
  </head>
  <body>
    <button 
    style="background-color: blue;font-size: 16px;" 
    onclick="alert('张家界')">按钮</button>
    <!-- //生成一个按钮，点击弹出文字 -->
    

  </body>
</html>
